Contributed to the Search Tools team, leveraging React, NodeJS, and Next.js to deliver bug fixes and new features. As a key contributor to the CX-Find project, played a pivotal role in its development and internationalization.CX-Find Development:• Assisted in implementing new features and bug fixes using GraphQL.• Enabled CX-Find for international teams, including Mexico's Sams-Club.• Achieved 80% code coverage using Jest for comprehensive unit testing.Cosmos Tool Development:• Led the migration of Cosmos to a new Next.js-based architecture upgrading React's and NodeJS versions.• Enhanced the tool's functionality for visualizing and comparing search data across different regions and caching engines (e.g., Meghacache & Cassandra)• Configured CI/CD pipelines using Kubernetes for efficient deployments.

Following my promotion to Staff Engineer, I was pivotal in driving the Fabric Cloud Router (FCR) project from its inception to production release, focusing on feature development, creating detailed Program Increment (PI) Readouts, and incorporating AI tools like ChatGPT and GitHub Copilot to improve performance.• Led Fabric Cloud Router feature development with JavaScript, React, Node.js, and TypeScript, for secure L3 connectivity and integrating cloud providers (Azure, AWS, Google Cloud, Oracle).• Pioneered the QuickConnect feature, incorporating BGP and routing configurations, resulting in a 30% increase in connection setup efficiency compared to standard methods.• Collaborated with UX teams on responsive design and D3.js graphics, enhancing user interaction.• Achieved 90% test coverage with Cypress, Jest, and Enzyme, ensuring feature reliability and high-quality performance.• Earned the “Magic Mention” award for exceptional efficiency and significant project contributions, notably improving UI development processes and web interface quality.In my volunteer work for the Quix Component initiative at Equinix, I focused on creating scalable and reusable web components with the Lit library, aiming to standardize web interfaces organization-wide.• Developed Web Components using the Lit library, emphasizing reusability and scalability. This effort played a key role in standardizing UI elements across Equinix web applications.• Documented features in Storybook to guide developers, facilitating integration and usability.

At Equinix, post-acquisition of Packet, I was pivotal in merging Edge Metal services with Packet's platform, focusing on software development and maintenance to facilitate seamless integration and enhanced functionalities for our combined customer base.• Spearheaded the integration of Edge Metal services into Packet’s system using JavaScript, React.js, Redux, and TypeScript, improving server, network, and collocation capabilities.• Merged stakeholder objectives with feedback cycles using Agile Methodologies, managing backend APIs and data to demonstrate progress and refine project scope effectively.• Enhanced development efficiency through combined Git code submissions and the creation of reusable components, fostering a cohesive design across the platform.• Performed detailed peer code reviews and design validations on GitLab and GitHub to uphold high-quality standards and system robustness.

Returning to WalmartLabs, this time with the Search Tools Team, I leveraged my prior experience and technical expertise to enhance the user experience on walmart.com.• Enhanced Search Optimization through full-stack development on the CX-Find project using React, Webpack, and Node.js, focusing on Item-Pinning and Facet Management.• Collaborated with the backend team on JSON contracts and Node.js/GraphQL schema updates.• Designed React components for Hey Presto Extension, integrating A/B test features with 'Preview Compare' for search analysis and rule customization for Catalog Specialists.• Fostered pair programming and bug bashing to improve code quality and team productivity.• Solved a major issue on walmart.com by adopting localStorage, reducing cookie size by 90%.• Managed user feedback for Search Tools via Slack, refining product features and user experience.

At Facebook, the birthplace of React.js, I honed best practices of the framework, significantly advanced my code review proficiency, and refined my approach to creating and evaluating Pull Requests.• Developed React.js components for Workplace's Safety Check, enhancing crisis response efficiency.• Refactored existing React components for compliance with new Lint and Flow rules, boosting quality.• Achieved 95% code coverage with Jest tests, ensuring the application's robustness and reliability.

I joined the Customer Experience Tools team to work on Back-end and Front-end projects.• Led the migration of the caching system from Redis to Memcached with Node.js.• Coded JavaScript for In-Context Analytics using Lazojs and Gulp for data integration.• Contributed to CX-Find using React.js for component integration with Redux and GraphQL.

Focusing on JavaScript and Node.js, I enhanced web applications for various customers, incorporating AngularJS, React, and MongoDB for comprehensive development and maintenance.• Excelled in scalable web development using JavaScript, Node.js, and Express.• Developed UI with AngularJS and React, improving rendering speeds by 20%.• Managed databases using MongoDB and Mongoose.• Ensured code reliability through unit testing with Mocha and Chai.

Delivered multiple SEO-optimized websites using Java Spring MVC, SQL Server, and AWS.• Enhanced UX in collaboration with designers; optimized performance/SEO via Lighthouse & PageSpeed Insights, achieving 96% scores.• Successfully maintained ongoing customer satisfaction with an updated website using React.js, Next.js, and PostgreSQL on Vercel. For more details, visit my portfolio at eSantini.com or the client's site at RafinBassFishing.com.mx.

Led the development of PIBS Projects and PIBS Time for project management and time tracking.• Enhanced web app responsiveness and data visualization using ASP.NET, C#, HTML, CSS, JavaScript, Bootstrap, jQuery UI, and HighCharts. Improved file upload efficiency by 80%.• Conducted end-to-end testing with Selenium and unit testing with Jasmine & JUnit.• Designed database structures in SQL Server for data integrity.